| 摘要 |
<p>An x-ray computed tomography system for helically scanning a patient, by translating the patient (42) as projections of the patient (42) at various beam angles are obtained, employs a detector array (16) having multiple rows displaced in along the direction of translation. The voxel attenuation values reconstructed from the multiple rows are combined to produce an image having an improved beam profile in along the translation direction. A cone beam reconstruction method, which accounts for the divergence of the rays of a fan beam (40) of x-rays, and helical scanning is used to further improve the slice profile. The voxels may be selected so that they cluster closely about the position of the desired slice plane. <IMAGE></p> |
